Duplicator



june 4, 1929.

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June 4, 1929.

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Filed March 12, 1928 5 Sheets-Sheet 5 amwm Fatentcd June 4;, 1929.

UNET

DUPLICATOR.

Application filed March 12, 1928.

The invention relates to duplicators, and more particularly to that form of duplicator in which a negative or reversed impression of matter to be copied is impressed upon an adhesive duplicating surface, and positive impressions taken therefrom by bringing sheets of paper or the like in contact therewith; and has for one of its principal objects to provide simple, efiicient and economical means whereby the rapid handling of sheets of paper and the feeding of the same to the adhesive duplicating surface of the duplicator and the stripping of the same therefrom are facilitated. Further objects and advantages of the invention will be in part set forth in the following specification, and in part will be obvious therefrom with out being specifically pointed out, the same being realized and attained by means of the instrumentalities and combinations pointed. out in the claims hereof.

Vith the above and other objects of the invention in view, the invention consists in the novel construction, arrangement and combination of various devices, elements and parts, as set forth in the claims hereof, certain embodiments of the same being illustrated in the accompanying drawings and described in this specification.

In'the accompanying drawings,

Fig. 1 is a side elevation of a duplicator constructed according to my invention, showing the movable parts of the device in one position;

Fig. 2 is a plan view of the same;

Figs. 3 and 4 are longitudinal vertical sections of a portion of the device, on an enlarged scale;

Fig. 5 is a vertical section, on an enlarged scale, of a portion of a duplicator construct ed according to my invention, showing another embodiment of the same; and

Fig. 6 is a plan view of the same,

in carrying myinvention into effect in one of the embodiments thereof which have been selected for illustration in the accompanying drawings and for description in this specification, and referring now particularly to Figs. 1, 2, 3 and 4. I provide a main frame structure of any form suitable for the purpose, such as may comprise side Serial No. 261,087.

frame members 12 suitably connected together so as to make a frame of sufficiently rigid construction, and a bed secured between said fr'ame members, which comprises or serves as a support for an adhesive duplicating surface 14:. This adhesive duplieating surface may be either the surface of the bed itself, or a portion of a film or strip secured to the bed, or, as shown in the drawings, there may be a comparatively long strip, the portions of which not in use may be stored upon rollers journaled between the side frame members, according to a con struction which is well understood in the art to which said duplicators relate. As the means for the storage of the film and for winding and unwinding the same therefrom and passing the same over the support, as the bed, .form no part of the present invention, it is not necessaryto describe the same 3 in detail, but it will be sufficient to point out that the rollers upon which the film is stored are indicated at l5, each of said roll.- er's being provided with a crank 17 for rotating the same; it will be understood, also,

that suitable checking devices, as a pawl and ratchet, may be provided for controlling the backward or unwinding motion of the roll, when it is desired that the same remain stationary.

Adapted to co-operate with the devices above referred to, there is provided an attachment comprising a paper-support or ta ble member 23, which may have an adjustable paper-guide 21. The shelf 23 is, as shown in the drawings, inclined at such an angle with the horizontal as may be desired or may be most practicable, and may of course be adjustable so that its position or angle of inclinationmay be changed as desired. he paper-holding shelf member is, in the preferred form of construction, secured to a movable frame 38. At the r' ,hthand side of the machine is a rod lO, the ends of which are secured to brackets ll-in the side frame of the machine. Mounted on this rod 40 is a sliding sleeve member eti- (see Fig. 2) to which is rigidly secured the frame 33 above mentioned. By this means the paper-supporting shelf member 23 is slidably mounted over the side frames-of the machine in such a manner as to be easily recipr'ocated thereon and also to be hinged or tilted up into a vertical position when desired.

Pivotally mounted in the frame 33 is a frame from which extends upwardly a handle 46. Near the extremities of the side members of this frame. are journaled the ends of a roller 47. At one end of the shaft of the roller 47 is a ratchet wheel 115, and attached to the frame 33 is a pawl 117 dapted to co-act with said ratchet and prevent the rotation of the roller l? in a reverse direction.

Swingingly mounted between the side frames 12 is a paper-stop, comprising arms 48 extending longitudinally of the machine, and a transverse member 49, L-shaped in cross-section, the upwardly extending flange or angle of which is adapted to serve as a stop against which a sheet of paper introduced into the apparatus may abut, as is clearly shown in Figs. 1, 3 and 4. This paper-stop device is mounted so that when the sliding frame 33 is at the extreme forward end of its throw, the paper-stop lies in a ho'iZont-al position as shown in Figs. 1, 2 and 4, but when the sliding member 33 is substantially back from its extreme forward position, the paper-stop member hangs in an approximately vertical position, as shown in Fig. 3; the reason for this will be made clear when the operation of the device is set forth.

The operation of this embodiment of my invention is as follows. The first step in the operation, as is usual in all devices of this kind, is to transfer to the adhesive duplicating surface a reversed impression of the matter which is to be duplicated upon successive sheets ofpaper. This is done by feeding into the machine a sheet of paper upon which the matter to be duplicated has been written or printed with suitable duplicating ink. The machine is set in the position shown in Figs. 1, 2 and l, and the parts are then in such relation that a sheet of paper (indicated at 70 in Figs. 1, 3 and 4) which bears upon its under side the ma ter to be transferred to the adhesive duplicating surface, may be fed down by hand over the paper-shelf until its front edge rests against the upwardly extending flange of the transverse paper-stop member l9. The handle 46 is then moved rearwardly of the machine, which lowers the roller 47 and presses the forward end of the sheet of paper upon the adhesive duplicating surface. The

sliding parts are then moved rearwardly, and

the roller l7 passes over the paper 70, depressing the whole portion thereof upon the adhesive duplicating surface, except a small strip at the forward edge of the paper which has been resting upon the longitudinal flange of the member 49. As the sliding frame 33 moves rearwardly, the pivoted paper-stop member is released and falls into the position shown in Fig. 3, thus permitting the unattached marginal strip at the forward end of the paper to be gripped by the hand and stripped from the adhesive dupli-- eating surface. When the sliding frame 33 has reached the extreme rearward end of its course, the paper 70 may be completely stripped from the adhesive duplicating surface, a-nd there'has been transferred to the latter a reversed impression of the matter on the paper. For some work and under certain circumstances, it is not sufficient to depress the master-sheet upon the adhesive duplicating surface instantaneously and immediately strip the same, but it is desirable to allow the master-sheet to remain in contact with the adhesive duplicating surface for a substantial length of time, which of course may be done at the discretion of the operator. But finally, upon the master-sheet being removed, the apparatus is ready for the duplicating operation. In order to carry out this duplicating operation, blank'shcets of paper aresuccessively fed along the papershelf up to the paper-stop, and the operation of depressing the roller 47, moving the sliding frame rearwardly over the paper, and stripping the sheets of paper from the adhesive duplicating surface, is repeated until as many copies have been produced as are desired.

In the modification of the invention shown in Figs. 5 and 6, the principal and essential parts of the invention are substantially the same as in the embodiment already described, this modification having been devised in order to permit copies to be made upon a sheet of paper without leaving any substantial marginal strip of blank paper. In some cases it is desirable to utilize all possible space upon the paper and to impress as many words as possible upon the same sheet, and the necessity of this is sometimes so extreme that nota single line of marginal space can be spared at the top of the paper. In this second-described modification, the same reference numerals are given to the analogous parts, except that the supporting shelf, which is here shown at a different angle from that of the other figures of the drawings, is designated 16, and the swinging paper-stop, which is of a somewhat different construction, has been given different reference numerals.

Referring now more particularly to Fig. 5, the paper-stop will be seen as comprising longitudinally extending arms 65 pivotally attached to the side frames at 66, and having extending transversely across between. their rear ends a flat member 67. Thisfiat member has two differently located devices adapted to act as paper-stops, one being an upwardly extending flange 68 at the forward edge of the flat member, and the other a notch or recess 69 at the rearward edge thereof.

Swingingly mounted near the front end of one of the side frames is a stop 71, which may be placed either in the rearwardly extending position shown in Fig. 6 and in the full lines in Fig. 5, or in the forwardly eX- tending position shown in the dotted lines in Fig. 5.

The operation of this embodiment of my invention is substantially similar to the operation of the embodiment already described, with the exception of the manner in which the mechanism may be adjusted to avoid marginal blank spaces upon the paper. \Vhen it is desired to print upon the paper in the usual way, that is, leaving a substantial blank margin at the top of each printed sheet, as described with reference to the other embodiment of the invention, the stop 71 is swung into the forwardly extending position, as shown in dottedlines in Fig. 5. This permits the sliding frame 83 and the parts borne by it to pass to the extreme forward end of their throw, and the operation of duplicating may then take place substantially as already described. But when it is desired to print upon the whole sheet of paper, that is, leaving no margin at the top, the stop 71 is swung rearwardly so that it occupies the position shown in full lines in Figs. 5 and 6, and the sliding frame then, when moved forwardly, brings the parts into such position that the sheet of paper when passed down over the paper-shelf, passes into the notch ,or recess 69, and upon the depression of the roller at? the extreme forward edge of the paper is depressed upon the adhesive duplicating surface and consequently the whole surface of the paper is available for receiving the matter to be duplicated.

The advantages of my invention will be quite obvious from what has been above said with regard to its construction and mode of operation, and I do not think that it is necessary to enter into any discussion of the same.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is as follows:

1. The combination with a duplicator comprising a stationary supporting frame, an adhesive duplicating surface borne by said frame adapted to receive an impression and to transfer same, a sliding frame adapted to be reciprocated over said adhesive duplicating surface, a paper-shelf borne bysaid sliding frame, and means borne by said sliding frame adapted to depress a sheet of paper upon said adhesive duplicating surface; of a paper-stop pivotally mounted on said station-arty frame adapted to lie horizontally when said sliding frame is at the forward end of the machine so as to register a sheet of paper passed from said paper-supporting shelf down to said adhesive duplicating surface at a predetermined position, and to fall into a vertical position when said sliding frame is moved backward from the forward end of the machine, whereby the stripping of said sheet of paper from said adhesive duplicating surface is facilitated.

2. The combination with a duplicator comprising a stationary supporting frame, an adhesive duplicating surface borne by said frame adapted to receive an impression and to transfer same, a sliding frame adapted to be reciprocated over said adhesive duplicating surface, a paper-shelf borne by said sliding frame, and means borne by said sliding frame adapted to depress a sheet of paper upon said adhesive duplicating surface; of a paper-stop pivotally mounted on said stationary frame adapted to lie horizontally when said sliding frame is at the forward end of the machine so as to register a sheet of paper passed from said papersupporting shelf down to said adhesive duplicating surface at a predetermined position, said paper-stop being provided with a plurality of paper-engaging means, and to fall into a vertical position when said sliding frame is moved backward from the forward end of the machine, whereby the stripping of said sheet of paper from said adhe sive duplicating surface is facilitated, and a hinge-like stop located near the forward end of said stationary frame and adapted when swung into one position to allow said sliding frame and paper-bearing shelf to bring said paper into a positionto engage with one of the paper-engaging means on said pivoted paper-stop and when swung into another position to allow said sliding frame and paper-bearing shelf to bring said paper into a position to engage with another of the paper-engaging means on said pivoted paper-stop.-

3. The combination with a duplicator comprising a stationary supporting frame, an adhesive duplicating surface borne by said frame adapted to receive an impression and to transfer same, a sliding frame adapted to be reciprocated over said adhesive duplicating surface, a paper-shelf borne by said sliding frame, and means borne by said sliding frame adapted to depress a sheet of paper upon said adhesive duplicating surface, said means comprising a roller rotatably mounted in said sliding frame; of a paper-stop pivotally mounted on said stationary frame adapted to lie horizontally when said sliding frame is at the forward end of the machine so as to register a sheet of paper passed from saidpaper-supporting shelf down to said adhesive duplicating surface at a predetermined position, and to :fall into a vertical position when said sliding frame is moved backward from the forward end of the machine whereby the stripping of said sheet of paper from said adhesive duplicating surface is facilitated, and means, as a pawl and ratchet, adapted to permit said paper-depressing roller to rorate when the sliding frame is moved backward over the adhesive duplicating surface but to prevent any rotation of the said roller 0 in the reverse direction.

In Witness whereof I have hereunto signed my name this 28th day of February, 1928. FREDERICK FRANCIS FECHER. 

